>TIGR00475 selB selenocysteine-specific translation elongation factor; InterPro: IPR004535 In prokaryotes, the incorporation of selenocysteine as the 21st amino acid, encoded by TGA, requires several elements: SelC is the tRNA itself, SelD acts as a donor of reduced selenium, SelA modifies a serine residue on SelC into selenocysteine, and SelB is a selenocysteine-specific translation elongation factor. 3' or 5' non-coding elements of mRNA have been found as probable structures for directing selenocysteine incorporation . This family describes the elongation factor SelB, a close homologue of EF-Tu. It may function by replacing EF-Tu. A C-terminal domain not found in EF-Tu is in all SelB sequences in the seed alignment except that from Methanococcus jannaschii. This family should not include an equivalent protein for eukaryotes. ; GO: 0003723 RNA binding, 0003746 translation elongation factor activity, 0005525 GTP binding, 0001514 selenocysteine incorporation, 0005737 cytoplasm.

Probab=98.90 E-value=7.7e-09 Score=81.11 Aligned_cols=138 Identities=25% Similarity=0.281 Sum_probs=105.4 Q ss_pred CEEEECCCCCCHHHHHHHHHCCHHCCCCCC------CCCCEEECCCCCCCCC--EEEEEEECCHHCCCCHHHHHHHHHHH Q ss_conf 024311466318889999855200023454------6872110001245683--58999508100024103566667888 Q gi|254780809|r 221 KIVILGHSNAGKSSLFNALAKKDVAIVTDI------PGTTRDVLTIDLDLEG--YLVKISDTAGIRETDDIVEKEGIKRT 292 (440) Q Consensus 221 ~v~i~G~pN~GKSSL~N~L~~~~~aIVs~~------~GTTRD~i~~~~~i~g--~~~~l~DTaGir~t~d~IE~~GI~ra 292 (440) T Consensus 2 ~~at~GHvDHGKT~L~k~LTgi~stsa~~lPeEkqKRG~tIDLGfAy~~l~~~n~~l~~iDvPGH-------e~f-l~n~ 73 (627) T TIGR00475 2 IIATAGHVDHGKTTLLKALTGIDSTSADRLPEEKQKRGMTIDLGFAYLPLPDINKRLGFIDVPGH-------EKF-LSNA 73 (627) T ss_pred EEEEECCCCHHHHHHHHHHCCCCCHHHHCCCCCCCCCCCEEECCCEECCCCCCCCCCEEEECCCH-------HHH-HHHH T ss_conf 68731244504799999850643012312774102576624604200367777713347855973-------899-9998 Q ss_pred HHHHHHHCCEEECCCCCCHH------HHH---HHCCCCCCCCCCCCCCCCCCCH-------------------HHHHHHH Q ss_conf 99850301102013589856------634---3128985322223334465420-------------------0000133 Q gi|254780809|r 293 FLEVENADLILLLKEINSKK------EIS---FPKNIDFIFIGTKSDLYSTYTE-------------------EYDHLIS 344 (440) Q Consensus 293 ~~~i~~aDlil~v~D~~~~~------~~~---~~~~~~~i~V~NK~Dl~~~~~~-------------------~~~~~IS 344 (440) T Consensus 74 lAg~~~i~~alLvVda~eG~~~QT~EHL~vl~~l~~~~~ivvltK~D~~d~~~~~~~E~~~~~~l~~~~~~~n~~~~~~S 153 (627) T TIGR00475 74 LAGIGGIDAALLVVDADEGVMTQTKEHLAVLKLLGIPELIVVLTKADRVDEEEVKRVEEELKEILEEYEFLKNAKIFKTS 153 (627) T ss_pred HHHHHHHHHHEEEECCCCCCCCCHHHHHHHHHHHCCCEEEEEEECCCCCCHHHHHHHHHHHHHHHHHHHHHCCCCEEEEE T ss_conf 66756540100354157788532389999999708961999973467456589999999999998764321157479991 Q ss_pred HHHHHHHHHHHHHHHHHHHHHC Q ss_conf 3323235899999999963220 Q gi|254780809|r 345 SFTGEGLEELINKIKSILSNKF 366 (440) Q Consensus 345 aktg~Gi~~L~~~I~~~l~~~~ 366 (440) T Consensus 154 A~tG~Gi~~Lk~~L~~L~e~~~ 175 (627) T TIGR00475 154 AKTGQGIEELKKELKNLLESLD 175 (627) T ss_pred CCCCCCHHHHHHHHHHHHHHHH T ss_conf 3468777899999986577765

HHsearch alignment for GI: 254780809 and conserved domain: TIGR00475